ROOKWELD

FieldRook is an open-source, native Windows diagnostic workstation built to answer a question every support technician faces: how do we know a reported fix actually worked? Instead of presenting AI confidence as proof, FieldRook separates observations from hypotheses and executes diagnostics only through registered, bounded tools. Human approval and execution are separate steps. Every reading retains source information, and claimed repairs are graded against fresh measurements. The most revealing test is a deliberate failure: after a genuine recovery of an isolated demo worker, a simulated fault is reintroduced. The technician reports a manual fix, but FieldRook independently rechecks and correctly returns NOT_RESOLVED. It preserves the disagreement rather than rewriting history. The v0.6.0-rc.1 public Windows prerelease includes Evidence Lens, a provenance-linked comparison of measurements, and Network Lab for consented read-only network diagnostics. The demo uses a real Windows application with synthetic fixture data and clearly labeled simulated model inference.